collective marks

  1. Barney Green

    Swiss collective responsibility marks on precious metal pocket watch cases (Poincon de maitre)

    If you are ever looking for the maker of a platinum, gold, or silver pocket watch case that features one of the six collective marks (hammerhead, hammer with stem, Geneva key, shield, FFBA, or crossbow), I recommend taking a look at David Boettcher's website. -> Swiss Poinçons de Maître I have...

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